STARLINK-35549, 66139
Orbit data source: Space-Track
STARLINK-35549, 66139 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Wed, 22 Oct 2025 UTC via an FALCON 9 launch vehicle from the Air Force Western Test Range (AFWTR). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.
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66139 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
SpaceX/Seattle
Mission
Operational Commercial Communications
Bus & Motor
STARLINK V2MO, Unknown motor
Mass
575 kg wet, ~530 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 2 Pan, 17.7 m
Radar Cross Section
36.964 m²
Expand to show TLE details & historyLast TLE update: 11 hours ago
TLE from 11 hours ago
0 STARLINK-35549
1 66139U 25237AB 26023.65303675 .00054171 00000-0 13516-2 0 9998
2 66139 53.1585 249.6320 0002819 77.2273 282.9047 15.39686025 15708Epoch: 2026-01-23T15:40Z
TLE epoch observation values (Epoch: 2026-01-23T15:40:22.375Z)
Latitude
0.00001°
Longitude
-108.44999°
Altitude
447.511 km
Speed
7.645 km/s
True Right ascension
16h 38m 31s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
03:30:35
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
449.219 km
Perigee altitude
445.371 km
Semi-major axis
6,825.432 km
Eccentricity
0.00028
Inclination
53.1585°
RAAN
249.632°
Arg. of periapsis
77.2273°
True anomaly
282.87321°
Mean anomaly
282.9047°
Eccentric anomaly
282.88896°
Mean motion
3.849 °/min
Orbital period
93.53 mins
BSTAR
0.0013516
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Other satellites on launch #237 in the year 2025 (2025-10-22 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.STARLINK-35549 Visibility forecast
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Span | Click to sort rows by Start time (UTC) header in descending order | Start Az. | Max El. time (UTC) | Max El. Az. | Max El. | End time (UTC) | End Az. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2026-01-24 16:45:22.068Z | 186.901° SSW | 2026-01-24 16:48:22.068Z | 116.523° SE | 24° | 2026-01-24 16:50:22.068Z | 76.873° E |
| 4 mins | 2026-01-24 18:23:22.068Z | 277.26° WNW | 2026-01-24 18:25:22.068Z | 338.768° N | 28.475° | 2026-01-24 18:27:22.068Z | 26.316° NE |
| 4 mins | 2026-01-24 23:18:22.068Z | 345.181° N | 2026-01-24 23:20:22.068Z | 38.835° NE | 24.258° | 2026-01-24 23:22:22.068Z | 82.328° E |
| 5 mins | 2026-01-25 00:55:22.068Z | 284.589° WNW | 2026-01-25 00:57:22.068Z | 228.162° WSW | 31.116° | 2026-01-25 01:00:22.068Z | 159.602° S |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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